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Voice coil motor with guiding posts and stopping bars

a technology of voice coil motors and guiding posts, which is applied in the direction of mirrors, dynamo-electric machines, instruments, etc., can solve the problems of difficulty in making vcm and inability to perform satisfactorily vcm

Inactive Publication Date: 2010-12-14
HON HAI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This design enables the voice coil motor to effectively operate in miniaturized forms by ensuring reliable movement and stability, overcoming the limitations of previous VCMs in compact sizes while maintaining performance.

Problems solved by technology

However, in the case of a highly miniaturized VCM, it is difficult to make the VCM, and the VCM may not be able to perform satisfactorily.

Method used

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  • Voice coil motor with guiding posts and stopping bars
  • Voice coil motor with guiding posts and stopping bars
  • Voice coil motor with guiding posts and stopping bars

Examples

Experimental program
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Effect test

second embodiment

[0028]Referring to FIG. 4, an exemplary stationary magnetic field generator 30a of a VCM in accordance with a second embodiment is shown. The stationary magnetic field generator 30a is similar to the stationary magnetic field generator 30 illustrated and described above; however, a retaining frame 32a includes two first sidewalls 301a and two second sidewalls 302a. Each of the first and second sidewalls 301a, 302a is substantially a thin plate, and has an upper horizontal beam provided at the top thereof. An opening 307a is defined in each upper horizontal beam. Magnetic elements 34a are received through the openings 307a and retained in position abutting the first and second sidewalls 301a, 302a, respectively.

third embodiment

[0029]Referring to FIG. 5, an exemplary elastic member 50a of a VCM in accordance with a third embodiment is shown. In this embodiment, there are two elastic members 50a, which are similar to the first and second elastic members 50 illustrated and described above. However, each elastic member 50a is in the form of a single, slightly humped circular sheet. Each elastic member 50a has two generally circular (or generally annular) elastic portions 53a defined around a through hole 510a. Two slots 58a are defined in the elastic member 50a, thereby enabling the elastic portions 53a to have elasticity. In the illustrated embodiment, the slots 58a are arc-shaped. There are three first guiding holes 54a, and three second engaging holes 56a. There are two first engaging holes 55a. It is understood that the elastic members 50a are applied to a stationary magnetic field generator and a movable magnetic field generator, wherein the stationary magnetic field generator has three protrusions, and ...

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PUM

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Abstract

An exemplary voice coil motor includes a hollow stationary magnetic field generator, a movable magnetic field generator, two elastic members, a hollow case and a base. The movable magnetic field generator is received in the stationary magnetic field generator. The two elastic members are adjacent to two ends of the stationary magnetic field generator. The case and the base serve as a package for all of the above elements. The case has a top sheet. The movable magnetic field generator has guiding posts slidably received in the top sheet, and stopping bars. The stopping bars of the movable magnetic field generator are capable of limiting the movement of the movable magnetic field generator toward the top sheet by abutting the top sheet.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure relates to voice coil motors.[0003]2. Description of Related Art[0004]Voice coil motors (VCMs) are widely used, for example, as lens actuators in camera modules. Camera modules are becoming progressively more miniaturized over time, and thus VCMs are correspondingly being required to be made smaller and smaller.[0005]A typical VCM includes a stationary magnetic field generator, a movable magnetic field generator, at least one elastic member attached to the stationary magnetic field generator, and a case receiving all the above-mentioned elements therein. The movable magnetic field generator has coils of wire wrapped around a periphery thereof, and, for example, can have lenses received therein. The movable magnetic field generator together with the lenses can be moved by the magnetic field generated by the stationary magnetic field generator. The case has a top sheet. The movable magnetic field generator usually has a pl...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H02K41/00G02B15/14
CPCH02K41/0356
Inventor LIAO, CHIA-HUNG
Owner HON HAI PRECISION IND CO LTD